set terminal postscript eps color enhanced font "Helvetica,16pt" size 8.6cm,6cm
set output "g2.eps"

set logscale x
set xr [10**-15:10**-9]
set yr [0:2]
set xl "Timing Separation {/Symbol t} [s]"
set tics auto
set ytics 0.5
#set tics scale 2
set yl "g^{(2)}({/Symbol t})"
set xl offset 0,0.3
set yl offset 1.2,0
set format x "10^{%T}"
set format y "%2.1f"

set label 1 "Unfiltered \n Starlight" at 0.3*10**-14,0.85
set label 2 "Filter {/Symbol Dl} \n = 1 nm" at 0.7*10**-12,0.85
set label 3 "Filter {/Symbol Dl} \n = 2 pm" at 0.8*10**-10,0.85
set label 4 "{/Symbol t}_{t} = 40ps" at 0.4*10**-11,0.35


#set arrow from -1.15,600 to -0.65,600
#set arrow from 1.15,600 to 0.65,600
#set arrow from -0.55,500 to -0.05,500
#set arrow from 0.55,500 to 0.05,500


g2(x) = 1 + exp(-abs(2*x)/(0.5*10**-9))
gg2(x) = 1 + exp(-abs(2*x)/(10**-12))
ggg2(x) = 1 + exp(-abs(2*x)/(5*10**-15))
set arrow from 40*10**-12,0 to 40*10**-12,2 nohead lc 3

plot g2(x) w l lt 1 lc 1 lw 2 notitle, gg2(x) w l lt 1 lc -1 lw 2 notitle, ggg2(x) w l lt 1 lc 2 lw 2 notitle